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Now you can escape the greatest
danger of BLOWOUTS!
That's why we name these amazing new tubes Life Guards*
Life itself may depend upon what happens in those first few precious seconds after a tire bursts on a swift-moving car. 
For the greatest danger of blowouts is the sudden loss of control- when all the air in a tire escapes in a flash, and you find yourself fighting to control a car with a writhing, flabby, shapeless thing on one wheel. 
So Goodyear set out to prevent that loss of control by preventing the complete escape of air, even when a tire bursts wide open. 
To do this, we developed a tube within a tube- a two-ply fabric reinforced inner reserve chamber of air- so that the tire goes "soft" instead of "flat."
It wasn't the easiest job in the world and 1300 different designs were tried and rejected before the LifeGuard* Tube was finally perfected.
Then blowout after blowout was deliberately staged. Tires were ripped, torn, blown apart with knives, with spikes, with dynamite, with cars traveling at speeds ranging from 50 to 70 miles an hour. 
And now we can tell you, with full confidence, that these astounding new tubes make a blowout no more hazardous than a slow leak- for in all our hundreds of tests, no car had a single accident. 
These new tubes in your tires will ride just the same, steer just the same, look just the same as tubes you have formerly used. They inflate through a single valve, are easily installed. 
But like steel bodies or safety glass- they provide priceless protection in emergency.
Naturally, they cost somewhat more, for they are built- not to save money- but to save lives.
The Goodyear Tire & Rubber Company, Inc., Akron, Ohio
* LifeGuard is a trade-mark of The Goodyear Tire & Rubber Company, Inc., and is protected by patents applied for


How LifeGuard tube looks inside tire during normal driving
vent hole
inner fabric tube
outer tube

Casing and outer tube spiked to cause made-to-order blowout. Note that two-ply fabric-reinforced inner chamber remains intact. Car rides on this reserve air until it can stop in safety.
LIFEGUARD TUBE

THE GREATEST NAME IN RUBBER
GOOD YEAR
MORE PEOPLE RIDE ON GOODYEAR TIRES THAN ON ANY OTHER KIND